Display

Damage resistant glass (such as Corning Gorilla Glass or Asahi Dragontrail Glass) is thin, lightweight, and can withstand high levels of force.

For example

Panasonic Eluga Z1

4.screen size

4.5"

4"

The bigger the screen size is, the better the user experience.

Best

Huawei Mate 20 X

7.2"

5.every pixel has three subpixels

Lenovo A820

Samsung Galaxy Ace 3

The device has a display with three full subpixels per pixel, resulting in a sharp and crisp picture. Pixels in some displays (like AMOLED) share one subpixel to preserve space. This can result in a less crisp, slightly blurred image.

6.has an IPS screen

Lenovo A820

Samsung Galaxy Ace 3

IPS (In-Plane Switching) is a technology used for LCDs. It was designed to overcome the main limitations of normal TFTs TN-matrices: relatively slow response times, small viewing angles and low quality color reproduction.

Performance

1.RAM

1GB

1GB

Best

Vivo NEX 2

10GB

2.CPU speed

4 x 1.2GHz

2 x 1GHz

Best

Meizu Pro 7 Plus 64GB

10 x 2.6GHz

3.has an external memory slot

Lenovo A820

Samsung Galaxy Ace 3

The device has a standard memory slot (such as an SD or micro SD card slot) so that you can either extend the internal storage with affordable memory modules or you can retrieve data, such as photographs, easily from a memory card.

4.internal storage

4GB

4GB

Best

Smartisan Nut R1

1024GB

Cameras

1.megapixels

8MP

5MP

Best

Huawei Mate 20 X

40 & 20 & 8MP

2.video recording (main camera)

720 x 30fps

720 x 30fps

The maximum resolution available for videos shot with the main camera. Although it may be possible to choose among other frame rates, those recordings usually have lower resolutions.

Best

Crosscall Trekker-X4

1080 x 120fps

3.has a front camera

Lenovo A820

Samsung Galaxy Ace 3

A front camera, also called secondary camera, can be used for video chats/selfies.

4.has a flash

Lenovo A820

Samsung Galaxy Ace 3

A flash is good for low-light environments, and can sometimes be used as flashlight.

Audio

With a standard mini jack socket, you can use the device with most headphones.

2.has a radio

Lenovo A820

Samsung Galaxy Ace 3

It works as an FM radio with included headsets

Battery

1.battery power

2000mAh

1500mAh

Best

Energizer Power Max P16K Pro

16000mAh

2.has a removable battery

Lenovo A820

Samsung Galaxy Ace 3

The battery is removable and can be replaced by the user if broken.

3.has a battery level indicator

Lenovo A820

Samsung Galaxy Ace 3

An indicator shows you when the device has low battery.

4.has a rechargeable battery

Lenovo A820

Samsung Galaxy Ace 3

The battery can be recharged and used over again.

Features

1.Is a multi-user system

Lenovo A820

Samsung Galaxy Ace 3

2.Has offline voice recognition

Lenovo A820

Samsung Galaxy Ace 3

Offline voice recognition enables you to perform voice actions, like dictating texts or using various voice commands, without an internet connection.

3.Supports Java

Lenovo A820

Samsung Galaxy Ace 3

4.Allows app installs on the device's external storage

Lenovo A820

Samsung Galaxy Ace 3

5.Is free and open source

Lenovo A820

Samsung Galaxy Ace 3

Anyone is free to use, copy, study, and change the software in any way, and the source code is openly shared so that people are encouraged to voluntarily improve the design of the software.

6.Has sharing intents

Lenovo A820

Samsung Galaxy Ace 3

If an app has sharing capabilities and the developers have indicated it, the app will automatically appear in your list of sharing options. Some OS’s limit direct sharing options to a select few apps, which means you have to open apps separately in order to upload the files you want to share.